Welder&#39;s tongs



Jan. 30, 1923.

, 1,443,798. R. MAmcE.

WELDER'S TONGS. msn muli. 192x. 2 sains-sneu :4

.15- 'the electrode is Patented Jan. 30, 1923.

noter. aumen, or rmsnvim'xn 'miriam 'nimma nnpunew'rmniy r, i921. sei-uiire; esima.

To all edwin. it

, Be it lmowxlhet I5 Roni. 'MA1-rien, Si

citizen of die,United-,SeiA meaning Philadelphia, in the countytrlhilldelplia State of Pennsylvemigand .Welders Tongs, of 'which thefollowingis aapecilcation.. The present invention has todo with-certainim rovementain Welders to' which are useiiJ for conduct and deliveringthe electrical current toi-ge electrode need in en electric weloperation. These ton s are provided with jawsfby means of whic.

Inithepe'st it has been the almost-universel. custom to attach the.electric cablles directly to auch jews and et e point in advance of thehandle grip. Theseelectric cables areA nerally flexible, but owing tothemegnitu .of the current used, it is necessary to use/such a la cablethatl it cen be conveniently attinrzlied directly to the hws; butfwhenso attached it is liable to me brokenowi to the constant bending,Vseriousl interferes with the convenient munipu ation of the tongs duringthe weldl i otherwise such Furthermore,

in .operation ne of the ob'ects of the tion' is to provi e s onstru theelectric cable may be'iittached to 'the tong nt a point beckof thehandle grip, the \currnt being,I then conducted' f pest or through thehandle grip to the jaws them selves.. When 'this a ment and forni oftongs is provided itjmay be vvery easily 4und conveniently manipulated,so that the quality of the work mit)r be much improved. Owing to themagnitude of the electric current which is used during 'the weldingoperation1 it is ynecessary to employ a reletively large conductor forcarrying the ciirrent through or past the handle grip as conductor would'become overliented. In fact even when using u conductor of relativelylarge size a con- 'sideriible amount of heat `js generated.

resent nventhe conductor in that portion adjacent to the handle gripitself, so'asto protect the operator from electric shock. 4In ome cas Iform the handle grip itself of heat insulating material so thiit itserves-the double function of protecting-the operator against shock, andalso against burning by heet.

Another feature of the invention in this the flow o lieve @inventedcertain new and useful .Improvements in unifierY which il iymeims ofa.'

ion in which.

A4--4 of Fig. 3 looking` it is very desirable to insulate connection hastodo' witli'the provision of 'that :they: willhandle ofv such form'-very re'a il dissil'mte the heet -generated by l currentthrough 'theconducting portion. For :this iii-pone, I 4sometimes Hrovide theinsulatingI material` o'f the andle grip with slots or openings allowingtheV eirculationof cir' directlytothe electrical conductoritself;`

@ther objects and 'uses of the invention will'appearfrom e tletiiileddescription of the same, whichlconsists iir the features ofVconstruction und combinations of parts here:

iniift'er desoriliedaiiidohiimed. l*

, In the drawings;

1 shows;` a' ion' tudinnlsection through a pair of tongsein oilyinp;the'A features of the preseht'invention, said tongs including a will'o'npivotedmernbers which provide` jaws' for clampingr the electode' 'ofthe arroiis';

Fig. 3 showsv n longitudinal section through'- another' forni of tongsprovided withA a single' handle member {miiof--jaws which iiiuy bedrewnto her suitable clamping ievice:

Fig. 4 shows a fragmentary face View of the' clamping device o one o'the jaws of tlie'tongs of Fig. 3, being taken on the ,line inthedirection of the arrows;' A J Fig. 5' shows n cross section teken onthe line 5 5 of Figx. looking in the direction o'f the arrows; und

Eig. G shows a crosigeection Cuk'en on the carrying' a showsa crosssection taken on'tlie 4 :soA

line 6-6 of Fig. inlooklng in the direction of the arrows. y

Referring irst to the arrangement shown in Figs. 1' und 2, the vsemeincludes a. pair o members 7-end 8.' These members iucludethe whicha're'of relativelyY large cross section us shown in Fig. 2,- su cient infact to carry the large currents necessary without mete rialoverheating.

The conductingelements 9 and 10 are pivoted together at the point 11 andtheir end portions provide the co'operuting jaws 12 and 13. The innerfece of the jawylB is provided with a. lining 14 held'innlece by -meansof the screws l5, lseid lining being of conducting metal, but may berenewed from damage by burning.

replaceableso that it conducting elements ilV und l0' time to timen'ncase'of 1 IThe lower ends of thel conducti inembers 9 and l0 terminateinlthe con noting lugs 16 and 17 res 'rely to'which-may be attached theterminals 1R .and 9 by means of wing nutsl or the like 20 and l.

The current from the oonnecton'z 181ml inflows directly through theelemente 9 and l0 to the jaws. Thse elements 9 and l0 are protected b vmeans of heat and elec tricnllyrinsnlating covers 22a`nd 23 whichconstitute the handle'grips.v Inorder. to facilitate thev ventilation ofthe conducting elements 9 und 10, I prefer to formthcm with irregularsurfaces is shown in Fi 2*.' so as to establish the air pessaplesrlt w,'ch

xnaterinlly facilitate the ventilation and-consequent tooling of Vthecondnctl of the conducting elements illnctrated is of rlmnnelhapedV cwsssection and thnt a spring member 25 has its end portions 26 and 27seated in the channels o Tile inner surfaces of the conduct' members Siand 10 are also exposed to the cooling intim-nce of the freelycirculating air.

In tl\e constructionshown in Fi 3, '4, and 6, there is bnl: one single,re atively large conducting element 28. to the lower end 2li of whichmuy be renmvubivuttuched a connector 30 by means. of the bolt Fill.A The-i-unducting element 28 at its inner end cnrries the jaws 32 ad 83 whichare securetlto it by means of u through boit 84, the jaws normallytending to separnte from 'each other by renson of their spl-1n?quality.4 A wing nut 85 is provided on tie cross 36 for forcing togetherthe end portions 37 and 38 of the jaws.- These end portions may bcprovided with the chnnneha or serretions 39 ne illnstrnted in 4.

The handle portion o f is construction includes the semi-circular heatnod electri cally insulating members 40 end 41, drawn togetherintheucentral portions by means of cross bolt 42. These msnlatingmembers 40 and 41 are preferably formed on o smaller curvature than the.cnrreture ofthe conducting element 28, so as to establish the airJms'soges 43 and M which extend'longitndmally through the tongs andserve to effectively ventilata the adlacentportlons of the element 28. Ialso prefer to cause the Vmembers 40 und .other as Vellown `said handleportion.

elements. l It will also he obeerved from Fig. that each' themem-f.,bei-s 9 ed 10. tending to force snidmemhers apart ond thus bring thejaws together. ,tricaily conducting materiel havi nuages 41 nto stopshort'of each nrtic'nlarl' in Fi'.. 5 and 6, eo ne to estab ish theadidilona air pas- Sas and 46 therein illustrated..

hllc I here shown und described only c ertaln cmbodnnents of' my presentinventiornetill it will he observed that in eachose theeelertrcall)Yconducting member consti tutes a portion of the handle of the device;that the-electric cable' is u'dapted ,to bevattached to saidronductinglmember beyond so thatlthecnrrent flows tlu'ough the handleportion; that the handle portion itselfis provided witli heat. andelectrically 'insulating grips; und that the entire al'un electricallyconc noting ventilgted and therebyr I claim:

A device -for 'ppin and holdi -electrodes for electa-gill*l welding'comprtr'lgn e pgiir of companion meznbc'ersi eo'chof w :ich consistsofan elongated metallic bar of elecet one end a flattened connectorelement e opted to receive' a ile'ttened cable terminal, and hav ing nl:its other end a flattened jaw for'eleccooled.

-trlcal contact with an electrode member, all

of said parte for each of said contacting members being integrallyformed' from its termine] connector to its jaw' whereby electric currentlmuy flow tlirongli said member from the terminal connector tothe jawwith consequent.

a minimum ot resistance und heating. the contacting` members beingrovided ywith co-operating proections ont ieir adjacent faces adjacentto t otnl connection between the rejections of the two members, the twomem rs'beingr engolarly formed with respect to each other whereby whentheir jaws are in tint contact their .body portions are separated at'the other side o said pivotal connecti a U- sha d spring between scidbody rtions ten ing to seperate them to there torce the jaws towards.each other, :and e handle gripof hectic-nd electrically insulatingnmterml mounted on each of sind y portions, there h eng passages -forthe tree circulation of airbetween each bod. portion and the handle gripthereon, su stantinll?7 as described.

ROYALY M'ATTICE.

'ementis so formed thettht member is effen-tively Uli

